Hi phildunlap,

I use a simple USB A male to B male cable to connect my Arduino and unfortunately I am not capable of building 485 type of connection.

Any type of timing settings (even above 10 s) resulted in aborted polls in Mango, while as strict polling as 500 ms or 1 s in ScadaBR or RapidSCADA or any other Modbus Master (downloaded some applications acting as Modbus Master) do not act like Mango with the same settings. Therefore, I do not know what type of timing override I might employ to make it work.

Nothing comes to mind for this and would probably need to be a bit of java code written to do this.

What you are trying to do is going to require a solid understanding of Javascript. I think you should start by just trying to plot one or 2 data points on a chart.

The example in the dashboards module in web/tutorials/dataPointChart.shtm will get you started. Once you have an understanding of how that works I can provide a slightly more advanced example that will show you how to manipulate the data.

Good Luck!